Patents Assigned to Chemical Systems Incorporated
  • Container for a bubbler
    Patent number: 4915880
    Abstract: A bubbler assembly includes a quartz container formed with an indented bottom which defines a concave pocket to impart strength to the container. The pocket is filled with a heat conductive epoxy in order to improve the heat transfer characteristics of the bottom of the container.
    Type: Grant
    Filed: May 22, 1989
    Date of Patent: April 10, 1990
    Assignee: Advanced Delivery & Chemical Systems Incorporated
    Inventor: Glen D. Jenkins
  • Nonbiodegradable polymers
    Patent number: 4035457
    Abstract: A new composition, cellulose acetate-chlorobutyrate pyridinium salt, which has superior biodegradation resistance and polymer membrane forming characteristics and related compositions.
    Type: Grant
    Filed: May 1, 1975
    Date of Patent: July 12, 1977
    Assignee: Chemical Systems Incorporated
    Inventor: Robert E. Kesting
  • Microporous polyester membranes and polymer assisted phase inversion process for their manufacture
    Patent number: 3957651
    Abstract: Microporous membrane filters composed of polyesters derived from aromatic dibasic acids and especially polytetramethylene terephthalate are produced. These membranes are produced by a polymer assisted phase inversion process involving casting a solution of the polyester and assisting polymer to form a film, evaporating the solvent to form a membrane having inchoate micropores filled with the assisting polymer and subsequently at least partially leaching out the assiting polymer.
    Type: Grant
    Filed: April 30, 1975
    Date of Patent: May 18, 1976
    Assignee: Chemical Systems Incorporated
    Inventor: Robert E. Kesting